That is the error when I'm trying to compile my project and when going to Qt Versions in the options menu, it says that no compiler can produce code for this Qt version. Please define one or more compilers when I have 6 compilers in the compilers tab.

The interesting question is: Is any of those compilers compatible with the Qt version you want to use?

E.g. if you have a Qt build with MSVC2010, then having MSVC2008 and 100 different instances of mingw installed will not do you any good: Those will produce binaries that will fail when linked to your Qt libraries.

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:-1: error: Qt Creator needs a compiler set up to build. Configure a compiler in the kit options.

[quote author="Tobias Hunger" date="1356274782"]The interesting question is: Is any of those compilers compatible with the Qt version you want to use?

E.g. if you have a Qt build with MSVC2010, then having MSVC2008 and 100 different instances of mingw installed will not do you any good: Those will produce binaries that will fail when linked to your Qt libraries.[/quote]
Well you're just telling me the exact same Qt is telling me, I'm asking for a fix. And excuse me for my bad attitude, I'm just having a bad day.

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:-1: error: Qt Creator needs a compiler set up to build. Configure a compiler in the kit options.

Well, you're not providing the information necessary to be more specific. Without any information but the error message all we can do here is repeat that to you:-)

Which compilers do you have? (Tools>Options>Build & Run>Compilers) Which Qt version? (Tools>Options>Build & Run>Qt versions, check the details there after clicking on one version). Which kit do you want to use and how is that configured.

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:-1: error: Qt Creator needs a compiler set up to build. Configure a compiler in the kit options.

[quote author="Tobias Hunger" date="1356277919"]Well, you're not providing the information necessary to be more specific. Without any information but the error message all we can do here is repeat that to you:-)

Which compilers do you have? (Tools>Options>Build & Run>Compilers) Which Qt version? (Tools>Options>Build & Run>Qt versions, check the details there after clicking on one version). Which kit do you want to use and how is that configured.[/quote]
Version name: Qt 5.0.0 MSVC2010 32bit (SDK)
Screenshot of compilers: http://i.imgur.com/WtWeh.png
I'm also getting an error in Visual Studio 2012 Ultimate when trying to create a Qt app:
First when clicking the first next > button in the Project wizard: http://i.imgur.com/5cZDM.png and when clicking finish it just takes me back to a new project.

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:-1: error: Qt Creator needs a compiler set up to build. Configure a compiler in the kit options.

[quote author="JKSH" date="1356281179"]You have MSVC 2012 installed. It cannot produce code for your version of Qt 5, which requires MSVC 2010. Those two compilers are incompatible.

Install MSVC 2010, and (most of?) your troubles should disappear.[/quote]
Do you mean that I need another IDE, I don't understand much about the programs I need and stuff. Can you send me a link where to download it?

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:-1: error: Qt Creator needs a compiler set up to build. Configure a compiler in the kit options.

[quote author="Dreeass" date="1356341542"]What do I have to do to make the add-in work? (Error screenshot is in a previous message)[/quote]Which add-in are you referring to? What do you want to use it for? I don't understand the language in the screenshot, sorry.

If you are talking about the Visual Studio Add-in, then the answer is: That add-in is not for Qt Creator. It is for people who want to write Qt programs using the Visual Studio IDE.